Macroscopic superposition and entanglement for displaced thermal fields induced by a single atom

Journal Article · Thu Mar 15 00:00:00 EDT 2007 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.75.032114· OSTI ID:20982245

Zheng, Shi-Biao ^[1]

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1. Department of Electronic Science and Applied Physics, Fuzhou University, Fuzhou 350002 (China)

We show that a cavity field can evolve from an initial displaced mixed thermal state to a macroscopic superpositions of displaced thermal states via resonant interaction with a two-level atom. As a macroscopic system (meter) is really in a mixed state before coupling with the microscopic system at some temperature, our result is important for studying the quantum measurement problem and decoherence under real conditions. For the two-mode case, entanglement of displaced thermal states between the modes can be obtained.

• OSTI ID: 20982245
• Journal Information: Physical Review. A, Vol. 75, Issue 3; Other Information: DOI: 10.1103/PhysRevA.75.032114; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
COUPLING
INFORMATION THEORY
INTERACTIONS
IONS
MIXED STATE
PHOTON-ATOM COLLISIONS
QUANTUM ENTANGLEMENT
TRAPPING